I thank all the Amazon team for the speed of shipping Windows 7 Full installation of Windows 7 from a black screen (I had lost all the vista system) 1) Originally I had vista oem Version (installation by the manufacturer) 2) Previously I had performed a backup of my documents to an external hard disk 3) remaining items on the pc boot setup builder (score 1) then install the application 2 score from the DVD-ROM windows7 4) Follow the instructions on demand 5) Windows 7 is faster Thank you